C# 应用程序中的 JumpList（最近的文件）

Question

目前我正在开发一个应用程序并想添加一个 Windows (7) JumpList。我遵循了几个教程并研究了文档，但我不知道如何完成这项工作。简而言之：我想要最近选择的文件的最新列表。因此，在关闭应用程序后，用户可以轻松地使用我的应用程序打开最近的文件。我已经实现了一些文件关联机制。

是否可以分享一些代码/教程如何解决上述问题？

提前谢谢你！

*我已经尝试过接下来的几个项目/教程：

• http://www.codeproject.com/Articles/103913/How-to-Create-a-Custom-Jumplist-with-Custom-Events
• http://channel9.msdn.com/coding4fun/articles/Windows-7-Jump-Lists
• http://csharp-tricks-en.blogspot.nl/2011/10/create-jumplist-using-c.html

*Coding 4 Fun的代码可以，但是不知道怎么开发最近的文件列表。

Answer 1

您可以查看this 文章。您需要在跳转列表中显示结果，而不是在 WPF 中显示结果。

为什么不尝试将最近打开的文件名存储在数据库或 xml 文件中并读取它以设置跳转列表。

例如。

private void ReportUsage()

   {

       XmlDocument myXml = new XmlDocument();

       myXml.Load(historyXml);

       string list = historyXml;

       jumpList.ClearAllUserTasks();

       foreach (XmlElement el in myXml.DocumentElement.ChildNodes)

       {

           string s = el.GetAttribute("url");

           JumpListLink jll = new JumpListLink(Assembly.GetEntryAssembly().Location, s);

           jll.IconReference = new IconReference(Path.Combine("C:\\Program Files\\ACS Digital Media\\TOC WPF Browser\\Icon1.ico"), 0);

           jll.Arguments = el.GetAttribute("url");

           jumpList.AddUserTasks(jll);

       }

       jumpList.Refresh();

   }

或者初学者的解决方案是将所有文件路径保留到给定最大容量的队列中，并在运行时将它们添加到菜单项中。对不起，我没有时间写整个代码。

Answer 2

正如your second article 中所述，您的应用程序必须注册为目标文件扩展名的处理程序，否则您的 Jumplist 的最新类别将不会显示。您可以找到更多关于文件关联注册的详细信息there。

您可以手动注册您的应用程序，但您需要管理员权限，因此不建议这样做，或者为您的应用程序创建一个设置项目，如coding 4 fun文章中所述，或者您可以让用户关联文件扩展名。

这是一个无需注册即可在 Windows 7 下使用的示例，只需右键单击我要加载的文本文件并选择“打开方式”并浏览到我的应用程序。

该示例需要 Windows API 代码包

public partial class Form1 : Form
{
    [STAThread]
    static void Main(string[] args)
    {
        var file = args != null && args.Length > 0 ? args[0] : string.Empty;

        Application.EnableVisualStyles();
        Application.SetCompatibleTextRenderingDefault(false);
        Application.Run(new Form1(file));
    }

    public Form1()
        : this(string.Empty)
    {
    }

    public Form1(string file)
    {
        InitializeComponent();

        Open(file);
    }

    [DllImport("user32.dll")]
    private static extern uint RegisterWindowMessage(string message);

    private uint wmTBC;

    /// <summary>
    /// Registers the window message for notification when the taskbar button is created.
    /// </summary>
    /// <param name="e">The event args.</param>
    protected override void OnLoad(EventArgs e)
    {
        base.OnLoad(e);
        wmTBC = RegisterWindowMessage("TaskbarButtonCreated");
    }

    /// <summary>
    /// Handles the window message for notification of the taskbar button creation.
    /// </summary>
    /// <param name="m">The window message.</param>
    protected override void WndProc(ref Message m)
    {
        base.WndProc(ref m);
        if (m.Msg == wmTBC)
        {
            OnTaskbarButtonCreated();
        }
    }

    /// <summary>
    /// Override this method to recieve notification when the taskbar button is created on Windows 7 machines and above.
    /// </summary>
    protected void OnTaskbarButtonCreated()
    {
        if (TaskbarManager.IsPlatformSupported)
        {
            jumpList = JumpList.CreateJumpList();
            jumpList.KnownCategoryToDisplay = JumpListKnownCategoryType.Recent;
            jumpList.Refresh();
        }
    }

    JumpList jumpList;

    private void openToolStripMenuItem1_Click(object sender, EventArgs e)
    {
        using (OpenFileDialog ofd = new OpenFileDialog())
        {
            if (ofd.ShowDialog() == DialogResult.OK)
            {
                Open(ofd.FileName);
            }
        }
    }

    private void Open(string file)
    {
        try
        {
            if (!string.IsNullOrEmpty(file) && File.Exists(file))
            {
                textBox1.Text = File.ReadAllText(file);

                if (TaskbarManager.IsPlatformSupported)
                {
                    jumpList.AddToRecent(file);
                }
            }
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message);
        }
    }


    /// <summary>
    /// Required designer variable.
    /// </summary>
    private System.ComponentModel.IContainer components = null;

    /// <summary>
    /// Clean up any resources being used.
    /// </summary>
    /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
    protected override void Dispose(bool disposing)
    {
        if (disposing && (components != null))
        {
            components.Dispose();
        }
        base.Dispose(disposing);
    }

    #region Windows Form Designer generated code

    /// <summary>
    /// Required method for Designer support - do not modify
    /// the contents of this method with the code editor.
    /// </summary>
    private void InitializeComponent()
    {
        this.textBox1 = new System.Windows.Forms.TextBox();
        this.menuStrip1 = new System.Windows.Forms.MenuStrip();
        this.openToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
        this.openToolStripMenuItem1 = new System.Windows.Forms.ToolStripMenuItem();
        this.menuStrip1.SuspendLayout();
        this.SuspendLayout();
        // 
        // textBox1
        // 
        this.textBox1.Location = new System.Drawing.Point(12, 27);
        this.textBox1.Multiline = true;
        this.textBox1.Name = "textBox1";
        this.textBox1.Size = new System.Drawing.Size(796, 306);
        this.textBox1.TabIndex = 0;
        // 
        // menuStrip1
        // 
        this.menuStrip1.Items.AddRange(new System.Windows.Forms.ToolStripItem[] {
        this.openToolStripMenuItem});
        this.menuStrip1.Location = new System.Drawing.Point(0, 0);
        this.menuStrip1.Name = "menuStrip1";
        this.menuStrip1.Size = new System.Drawing.Size(820, 24);
        this.menuStrip1.TabIndex = 1;
        this.menuStrip1.Text = "menuStrip1";
        // 
        // openToolStripMenuItem
        // 
        this.openToolStripMenuItem.DropDownItems.AddRange(new System.Windows.Forms.ToolStripItem[] {
        this.openToolStripMenuItem1});
        this.openToolStripMenuItem.Name = "openToolStripMenuItem";
        this.openToolStripMenuItem.Size = new System.Drawing.Size(37, 20);
        this.openToolStripMenuItem.Text = "File";
        // 
        // openToolStripMenuItem1
        // 
        this.openToolStripMenuItem1.Name = "openToolStripMenuItem1";
        this.openToolStripMenuItem1.Size = new System.Drawing.Size(152, 22);
        this.openToolStripMenuItem1.Text = "Open";
        this.openToolStripMenuItem1.Click += new System.EventHandler(this.openToolStripMenuItem1_Click);
        // 
        // Form1
        // 
        this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
        this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
        this.ClientSize = new System.Drawing.Size(820, 345);
        this.Controls.Add(this.textBox1);
        this.Controls.Add(this.menuStrip1);
        this.MainMenuStrip = this.menuStrip1;
        this.Name = "Form1";
        this.Text = "Form1";
        this.menuStrip1.ResumeLayout(false);
        this.menuStrip1.PerformLayout();
        this.ResumeLayout(false);
        this.PerformLayout();

    }

    #endregion

    private System.Windows.Forms.TextBox textBox1;
    private System.Windows.Forms.MenuStrip menuStrip1;
    private System.Windows.Forms.ToolStripMenuItem openToolStripMenuItem;
    private System.Windows.Forms.ToolStripMenuItem openToolStripMenuItem1;
}